bool namecache_fetch(const char *name,
int name_type,
struct ip_service **ip_list,
int *num_names)
{
char *key, *value;
time_t timeout;
/* exit now if null pointers were passed as they're required further */
if (!ip_list || !num_names) {
return False;
}
if (!gencache_init()) {
return False;
}
if (name_type > 255) {
return False; /* Don't fetch non-real name types. */
}
*num_names = 0;
/*
* Use gencache interface - lookup the key
*/
key = namecache_key(name, name_type);
if (!key) {
return False;
}
if (!gencache_get(key, &value, &timeout)) {
DEBUG(5, ("no entry for %s#%02X found.\n", name, name_type));
SAFE_FREE(key);
return False;
} else {
DEBUG(5, ("name %s#%02X found.\n", name, name_type));
}
/*
* Split up the stored value into the list of IP adresses
*/
*num_names = ipstr_list_parse(value, ip_list);
SAFE_FREE(key);
SAFE_FREE(value);
return *num_names > 0; /* true only if some ip has been fetched */
}
bool namecache_delete(const char *name, int name_type)
{
bool ret;
char *key;
if (!gencache_init())
return False;
if (name_type > 255) {
return False; /* Don't fetch non-real name types. */
}
key = namecache_key(name, name_type);
if (!key) {
return False;
}
ret = gencache_del(key);
SAFE_FREE(key);
return ret;
}
void namecache_store(const char *name, int name_type,
int num_names, struct in_addr *ip_list)
{
TDB_DATA key, value;
time_t expiry;
int i;
if (!enable_namecache)
return;
DEBUG(5, ("namecache_store: storing %d address%s for %s#%02x: ",
num_names, num_names == 1 ? "": "es", name, name_type));
for (i = 0; i < num_names; i++)
DEBUGADD(5, ("%s%s", inet_ntoa(ip_list[i]),
i == (num_names - 1) ? "" : ", "));
DEBUGADD(5, ("\n"));
key = namecache_key(name, name_type);
/* Cache pdc location or dc lists for only a little while
otherwise if we lock on to a bad DC we can potentially be
out of action for the entire cache timeout time! */
if (name_type != 0x1b || name_type != 0x1c)
expiry = time(NULL) + 10;
else
expiry = time(NULL) + lp_name_cache_timeout();
value = namecache_value(ip_list, num_names, expiry);
tdb_store(namecache_tdb, key, value, TDB_REPLACE);
free(key.dptr);
free(value.dptr);
}
BOOL namecache_fetch(const char *name, int name_type, struct in_addr **ip_list,
int *num_names)
{
TDB_DATA key, value;
struct nc_value *data = NULL;
time_t now;
int i;
*ip_list = NULL;
*num_names = 0;
if (!enable_namecache)
return False;
/* Read value */
key = namecache_key(name, name_type);
value = tdb_fetch(namecache_tdb, key);
if (!value.dptr) {
DEBUG(5, ("namecache_fetch: %s#%02x not found\n",
name, name_type));
goto done;
}
data = (struct nc_value *)value.dptr;
/* Check expiry time */
now = time(NULL);
if (now > data->expiry) {
DEBUG(5, ("namecache_fetch: entry for %s#%02x expired\n",
name, name_type));
tdb_delete(namecache_tdb, key);
SAFE_FREE(value.dptr);
value = tdb_null;
goto done;
}
if ((data->expiry - now) > lp_name_cache_timeout()) {
/* Someone may have changed the system time on us */
DEBUG(5, ("namecache_fetch: entry for %s#%02x has bad expiry\n",
name, name_type));
tdb_delete(namecache_tdb, key);
SAFE_FREE(value.dptr);
value = tdb_null;
goto done;
}
/* Extract and return namelist */
DEBUG(5, ("namecache_fetch: returning %d address%s for %s#%02x: ",
data->count, data->count == 1 ? "" : "es", name, name_type));
if (data->count) {
*ip_list = (struct in_addr *)malloc(
sizeof(struct in_addr) * data->count);
memcpy(*ip_list, data->ip_list, sizeof(struct in_addr) * data->count);
*num_names = data->count;
for (i = 0; i < *num_names; i++)
DEBUGADD(5, ("%s%s", inet_ntoa((*ip_list)[i]),
i == (*num_names - 1) ? "" : ", "));
}
DEBUGADD(5, ("\n"));
done:
SAFE_FREE(key.dptr);
SAFE_FREE(value.dptr);
return value.dsize > 0;
}
bool namecache_store(const char *name,
int name_type,
int num_names,
struct ip_service *ip_list)
{
time_t expiry;
char *key, *value_string;
int i;
bool ret;
/*
* we use gecache call to avoid annoying debug messages about
* initialised namecache again and again...
*/
if (!gencache_init()) {
return False;
}
if (name_type > 255) {
return False; /* Don't store non-real name types. */
}
if ( DEBUGLEVEL >= 5 ) {
TALLOC_CTX *ctx = talloc_stackframe();
char *addr = NULL;
DEBUG(5, ("namecache_store: storing %d address%s for %s#%02x: ",
num_names, num_names == 1 ? "": "es", name, name_type));
for (i = 0; i < num_names; i++) {
addr = print_canonical_sockaddr(ctx,
&ip_list[i].ss);
if (!addr) {
continue;
}
DEBUGADD(5, ("%s%s", addr,
(i == (num_names - 1) ? "" : ",")));
}
DEBUGADD(5, ("\n"));
TALLOC_FREE(ctx);
}
key = namecache_key(name, name_type);
if (!key) {
return False;
}
expiry = time(NULL) + lp_name_cache_timeout();
/*
* Generate string representation of ip addresses list
* First, store the number of ip addresses and then
* place each single ip
*/
if (!ipstr_list_make(&value_string, ip_list, num_names)) {
SAFE_FREE(key);
SAFE_FREE(value_string);
return false;
}
/* set the entry */
ret = gencache_set(key, value_string, expiry);
SAFE_FREE(key);
SAFE_FREE(value_string);
return ret;
}
